Thomas Hunt Morgan Question 9 options: demonstrated that chromosomes carry genetic material in the form of genes. studied mutations in Homo sapiens. thought change was gradual and occurred over long time periods. proposed the theory of inheritance of acquired characteristics.
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Answer:
Thomas Hunt Morgan demonstrated that
chromosomes carry genetic material in the form of genes.
T. H. Morgan gave the experimental verification of the chromosomal theory of inheritance by Sutton and Boveri.
He along with his colleagues worked with fruit flies (Drosophila melanogaster) which led to discovery of the basis of variation that occured due to sexual reproduction.
Related Questions
I think the answer is wrong. Does anyone know?
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9b. What was the method of energy transfer?
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Answer:
Heat can be transferred in three ways: by conduction, by convection, and by radiation. Conduction is the transfer of energy from one molecule to another by direct contact.
Explanation:
A solution has 75% salt therefore it has ___% water. The cell has 75% water and therefore ___% salt.
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Answer:
25 %
Explanation:
you have to add 75 + 25 = 100, which is the total
proteins, nucleic acids, lipids and carbohydrates are based on which molecule?
Carbon
Hydrogen
Nitrogen
Oxygen
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I think they are based on Oxygen
Rank the following branches of the bronchial tree in the order a molecule of oxygen would encounter them as it moves from the trachea into the left lung. _____ a. alveolar duct _____ b. alveolus _____ c. bronchiole _____ d. lobar bronchus _____ e. main bronchus _____ f. respiratory bronchiole _____ g. segmental bronchus
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Answer:
e. Main bronchus
d. Lobar bronchus
g. Segmental bronchus
c. Bronchiole
f. Respiratory bronchiole
a. Alveolar duct
b. Alveolus
Explanation:
The correct order a molecule of oxygen would encounter the branches of the bronchial tree as it moves from the trachea into the left lung is:
e. Main bronchus
d. Lobar bronchus
g. Segmental bronchus
c. Bronchiole
f. Respiratory bronchiole
a. Alveolar duct
b. Alveolus
The main bronchus is the first branch of the bronchial tree that leads into the left lung. It then divides into the lobar bronchi, which further divide into segmental bronchi. The segmental bronchi lead into the bronchioles, which then lead into the respiratory bronchioles. The respiratory bronchioles then lead into the alveolar ducts, which finally open into the alveoli, where gas exchange takes place.
mean by adaptation.
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Answer:
Adaptation is the evolutionary process whereby an organism becomes better able to live in its habitat or habitats.
Explanation:
Hey, there!
We simply define adaptation as the process of adjustment of organism with their environment .It increases the possibility of surviving of an organism for longer time as it helps to get food and protect from enemies. Organisms shows tge adaptation in the following ways:
By losing and gaining of organs.By changing the colour of body according to the habitat. By modification of organs.Hope it helps....
during the plateau phase of the cardiac action potential, which ion is entering the cardiac muscle cell?
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Calcium is the ion is entering the cardiac muscle cell during the plateau phase of the cardiac action potential.
What is the plateau phase of the cardiac action potential?The plateau phase of the cardiac action potential refers to the depolarization of muscle cells in the heart, which is fundamental for its contraction and thus pumps blood in the circulatory system.
Therefore, with this data, we can see that the plateau phase of the cardiac action potential depends on the presence of calcium to reach the stage of depolarization and contraction of muscle cells.
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a man is twice as old as his son.Five years ago the ratio of their ages was 9:4.Find the sum of their ages
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Answer:
75years
Explanation:
Let the Father's age be represented by 2x
Let the Son's age be represented by x
Five years ago;
Man's age will be = 2x - 5
Son's age will be = x - 5
If the ratio of their ages five years ago was 9:4, then;
2x - 5/x-5 = 9/4
4(2x - 5) = 9(x - 5)
8x - 20 = 9x - 45
- Collect like terms
-20 + 45 = 9x - 8x
25 = x
Hence, the son's age = 25 years
If x = 25, the father's age (2x) will be 2 × 25 = 50years
The sum of their ages will be = 25years + 50years = 75years
11. In pepper plants, the allele for hot flavor (H) is dominant to the allele for
mild flavor (h). A farmer crosses a homozygous dominant plant with a
recessive (mild) plant. What percentage of the offspring from this cross will
have hot flavor?
25%
50%
75%
100%
Answers
Answer:
100%
Explanation:
When a homozygous dominant plant (HH) is crossed with a recessive (mild) plant (hh), the offspring will all be heterozygous (Hh) and have the dominant hot flavor allele.
The Punnett square for this cross would be:
| | H | H |
|---|---|---|
| h | Hh | Hh |
| h | Hh | Hh |
As we can see, all of the offspring (100%) will have the dominant H allele and therefore have hot flavor.
Therefore, the correct answer is 100%.
replication is called a semi-conservative becasue half of the original strand is:_____
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Replication is called semi-conservative because half of the original DNA strand is used as a template to synthesize a new complementary strand.
During DNA replication, the double-stranded DNA molecule unwinds and separates into two individual strands. Each of these strands then serves as a template for the synthesis of a new complementary strand.
In semi-conservative replication, one of the strands acts as the template for the synthesis of a new strand, while the other original strand remains intact.
As a result, after replication, each new DNA molecule consists of one strand that is newly synthesized and one strand that is conserved from the original molecule.
This process ensures that the genetic information is faithfully passed on to the next generation, with each new DNA molecule containing one old strand and one newly synthesized strand.
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an enzyme functions in a biosynthetic pathway in bacteria. you predict that the product of the reaction may regulate the levels of the protein by
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An enzyme functions in a biosynthetic pathway in bacteria. You predict that the product of the reaction may regulate the levels of the protein by.
The product of an enzyme-catalyzed reaction can act as a regulator of enzyme activity. In biosynthetic pathways, the product of one enzyme-catalyzed reaction can act as an inhibitor of the activity of an earlier enzyme in the pathway. This type of regulation is known as feedback inhibition. The product of the reaction can bind to the enzyme and inhibit its activity, preventing the production of more of the product. This is important in maintaining the appropriate levels of metabolites in the cell. If the levels of a particular metabolite become too high, it can lead to toxic effects or interfere with other metabolic pathways. By regulating the activity of the enzymes involved in biosynthetic pathways, the cell can maintain appropriate levels of metabolites and avoid harmful effects.
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Why is water an important factor of an ecosystem
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A person eats a piece of food that is contaminated by bacteria. Which response will most quickly remove the bacteria from the body?.
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Vomiting would quickly remove the bacteria from the body if a person eats a piece of food that is contaminated by bacteria.
What effect does bacteria have on human body?
Bacteria are single-celled organisms that are living entities. They have shapes like rods, balls, or spirals under a microscope. A line of 1,000 of them could fit across the eraser of a pencil since they are so tiny. The majority of don't make you ill. Many kinds are beneficial. Some of them provide the body with essential vitamins, aid in food digestion, and eliminate disease-causing cells. Additionally, bacteria are employed to create nutritious foods like yoghurt and cheese.
But contagious microorganisms can give you a disease. Within your body, they multiply rapidly. Many emit toxins—a class of chemicals that can harm tissue and make you ill. Streptococcus, Staphylococcus, and E. coli are a few types of bacteria that can lead to infections.
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4) This is the word geologists use for loose pieces of minerals and rock. The particles are transported by wind, water, or ice,
and/or the force of gravity and eventually deposited.
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Answer:sediment
Explanation:
Figure 1 represents a segment of DNA. radiation can damage the nucleotides in a DNA molecule. to repair some types of damage, a single nucleotide can be removed from the DNA molecule and replaced with an undamaged nucleotide. which of the four labeled bonds in figure 1 could be broken to remove and replace the cytosine nucleotide without affecting the biological information coded to the DNA molecule?
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Answer:
This question is incomplete as it lacks options; the options are:
A) Bond X only
B) Bond W only
C) Bonds Y and Z at the same time
D) Bonds W and Z at the same time
The answer is C. Bond Y and Z at the same time
Explanation:
A DNA molecule is a double-stranded molecule made up of nucleotide units. According to this question, radiation can damage the nucleotides in the DNA molecule. However, the cell can repair this DNA molecule by removing the single damaged nucleotide and replacing it with an undamaged one.
In this case, the cytosine nucleotide is the damaged nucleotide. To repair this DNA in the image, the covalent bond holding the one nucleotide to another in one of the DNA strands must be broken.
The sugar-phosphate bonds as represented by letters Y and Z are the bonds that could be broken to replace the cytosine nucleotide by an undamaged one, without affecting the biological information coded to the DNA molecule. The bonds holding the neighboring nucleotides are also broken during the repair process. Note that, this form of repair is called BASE EXCISION REPAIR
The bond in figure 1 could be broken to remove and replace the cytosine nucleotide without affecting the biological information coded to the DNA molecule is C. Both Bond Y and Z at the same time.
It should be noted that a DNA molecule is simply referred to as a double-stranded molecule that's made up of nucleotide units. Radiation can damage the nucleotides that are in the DNA molecule.
Through the removal of the single damaged nucleotide and then replacing it with an undamaged one, the DNA molecule can be repaired. Based on the diagram, the cytosine nucleotide is the damaged nucleotide, therefore, in order to repair it, the covalent bond that's holding the nucleotides together must be broken.
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HELP ITS URGENT! PLEASE HELP ITS DUE TOMORROW
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As per the experimental values, When the temperature decreases the time taken for the starch to be digested increases. This means that when the temperature is decreased, the metabolic rate also decreases resulting in the decrease in the rate of digestion. As we decrease the temperature everytime by the value of \(10^0\)C, the rate of reaction decreases by the factor of 2.
_____________________________________A2)The slowest experiment was at Temperature \(20^o\)C by the rate of 0.066 and The fastest experiment was at Temperature \(40^o\)C by the rate of 0.32.
REASON:The reactants must contain sufficient kinetic energy to overcome a barrier called Activation Energy. Activation energy is the minimum amount of energy required to change the reactants into products. The Fastest reaction is at high temperature because when the temperature increases the molecules collide with one another more frequently, when the kinetic energy increases, more molecules make the effective collisions due to, so more molecules make up to the threshold energy. So increase in temperature increases the rate of the reaction.
_____________________________________A3)The optimum temperature for enzyme amylaze is 40 degree C because it has the fastest rate of reaction at that temperature. At high temperatures the shape of the enzyme is altered so that it is no longer complementary to its specific substrate., thus optimum temperature is 40 degrees, that is the reason why human body has temperature of 40.
_____________________________________A4)At high temperature the shape of the enzyme is altered so that it is no longer complementary to its specific substrate. Water boils at \(100^o\) C and at 100 degree C the enzyme gets denatured.
_____________________________________A4)At high temperature the shape of the enzyme is altered so that it is no longer complementary to its specific substrate. Water boils at \(100^o\) C and at 100 degree C the enzyme gets denatured.
_____________________________________A5)Independent variable is that variable which is changed. The changing of the independent variable causes the affect on another variable which is called dependent variable. The Independent variable is Temperature and the DEPENDENT VARIABLE is rate of reaction or rate of digestion.
_____________________________________A6)This question is already done, the table is complete.
_____________________________________Best Regards,BorzWhich element has four electrons that are available to form strong bonds,
making it crucial for building large
biomolecules?
A. Sulfur
B. Oxygen
C. Hydrogen
D. Carbon
SUBMIT
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Answer:
Carbon: is the correct answer for that question.
(Its actually Physical Science)
To create a molecular model a student will use blue spheres to represent nitrogen (N) and white spheres to represent hydrogen (H). which option correctly describes a model of ammonia, NH3?
A. three blue spheres and three white spheres
B. one blue sphere and three white spheres
C. three blue spheres and one white sphere
D. one blue sphere and one white sphere
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A molecular model is a three dimensional representation of a molecule that aids conceptualization of the actual nature of the molecule.
The correct answer is option B: one blue sphere and three white spheres
A molecular model helps us to see something close to what a molecule actually looks like in a three dimensional way.
The essence of molecular models is to aid conceptualization of details about arrangement of atoms in a molecule.
Since nitrogen is represented with blue balls and hydrogen is represented with white balls, it follows that a properly prepared model consists of one blue sphere and three white spheres.
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The map shows regions of Africa Europe Asia and Australia. It also shows a range of deforestation zones in these continents. On the map, red stands for high deforestation dark green stands for medium deforestation blue stands for low deforestation and pink stands for unavailable data identify the areas where species are most at risk of habitat loss.
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Answer:
Red area stand for high deforestation
Explanation:
The species are most risk of habitat loss at red zone that stands for high deforestation.
Because of high deforestation, the natural habitat is getting lost at faster rate in red area which will affect the natural vegetation and animals living in the forest.
Hence, the correct answer is red zone stands for high deforestation.
Answer:
Anything in a red zone
Explanation:
For me it was, Africa and Australia
Two pure-breeding mutant plants produce white flowers. When they are crossed, all of the progeny have wild-type purple flowers. What does this genetic complementation tell you?.
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The genetic complementation tells you that more than a single gene is involved in phenotypic determination for this type of genetic complementation.
Genetic complementation provides an explanation on why progeny display wild-type phenotypes from two separate organisms with homozygous recessive mutations. Complementation itself is defined as an interaction that exists between two separate strains of an organism that contain homozygous recessive mutations that induce the same trait but do not occur on the same (homologous) gene.
When new species of an organism with distinct homozygous recessive mutations that generate the same mutant phenotype are mated or crossed, the progeny display the wild-type phenotype. In the case of two pure-breeding mutant plants producing white flowers to have produced wild-type purple flowers as progeny, it shows that the genes responsible for the phenotypic expression of colours goes beyond the white genes alone. That is, there is a recessive gene that contributes to phenotypic expression. Though this gene is not expressed in the parents.
Complementation tests are used to determine these kinds of phenotypic expression. A complementation test, also known as a cis-trans test, determines whether two mutations associated with a certain trait reflect two distinct versions of the same gene (alleles) or are variants of two separate genes. This test can be used to identify where the gene for the purple colour emanated.
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In which of the following types of infection will the infected host cell burst?
A lysogenic infection
B prophage infection
C provirus infection
D lytic infection
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Answer:
D) lytic infection
Explanation:
During lytic infection, a virus enters the host cell, makes a copy of itself, and causes the cell to burst, or lyse.
Answer:
its D
Explanation:
lytic infection is the correct answer because the host cell will lyse AKA burst.
Which of the following shows natural selection?Select one:a.A horse's parents were racers. The fastest horses are bred to produce the fastest offspring.b.Some tuna live in the Pacific Ocean. They are fast swimmers so they are likely to survive and pass on their genes.c.Some trees produce apples for baking. Seeds from the largest apples are kept to produce the next generation of trees.d.Certain rabbits are raised for fur. Rabbits with soft fur are bred with other rabbits with soft fur. They eat grain and vegetables.
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Natural selection is the process in which some organisms that show better adaptation to the environment are more likely to produce an offspring. In the case of the exercise, the answer is:
b. Some tuna live in the Pacific Ocean. They are fast, so they are likely to survive and pass on their genes.
It means that as they are better adapted to that environment due to the fact they are fast swimmers, they are likely not only to survive, but to pass their genes and produce offsprings.
There are 13 species of Darwin's finches on the Galapagos Islands. They have many similar features but differ in beak size and shape. Which
explanation accounts for these characteristics? (1 point)
O Finch species interbreed.
O All finch species evolved from a common ancestor.
O Each finch species evolved from a different ancestor.
O Finch species have similar diets.
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The photo shows some penguins. Which item is part of the penguins'
community?
A. Ice
B. Fish
C. Seawater
D. Air
Answers
Answer:
B. Fish
Explanation:
Communities are made up of biotic factors (living organisms)
Answer:
B. Fish
Explanation:
Test approved
31.Animal cells can be found in a...
A Cow
B Rock
C Fragment of glass D Tree
32.Animal cells can be in both animals AND humans.
A False B True
33.What cell would make up a small patch of grass?
A Neither animal nor plant B Plant
C Both animal and plant D Animal
34.Which of the following shows the levels of organization that makes up an organism in the correct order from smallest to largest?
A organism, organ system, organ, tissue, cell B cell, tissue, organ system, organ, organism C cell, tissue, organ, organ system, organism D organ system, organism, organ, tissue, cell
35.What do all of these organisms have in common?
A They possess the same features
B They all have uniform offspring
C They have the same internal and external structures D They are all made of cells
36.According to cell theory, where did this cell come from?
A the nonliving environment B another living cell
C a multicellular organism D energy from sun
37.Rocks are not living because
A they are not made of cells
B they never move
C they aren't needed for humans D they don't break down
38.A group of tissues that perform a similar function is called_____. (Examples include the heart, lungs or stomach)
A organ system B cells
C tissues
D organs
39.When many organ systems work together it can form...
A organism
B organ system C organ
D cells
40. A group of cells that have similar functions? Examples are nervous, epithelial, muscle and connective
A atoms B organs C tissues D cells
41.This is a example of
A organ
B organ system C cells
D tissue
42.This is a example of A organ system
B organ
C cell
D tissue
Answers
Answer:
31) A. Cow
32) B. True
33) B. Plant
34) C cell, tissue, organ, organ system
35) D They are all made of cells
36) B another living cell
37) A they are not made of cells
38) A organ system
39)C organ
40) C tissues
41: Example of what?
42) tissue
Explanation:
31) Common sense.
32) Animal cell refers to a eukaryotic cell that lacks a cell wall and a large nucleus whereas a human cell refers to the basic functional unit of the human body. The human cell is a type of animal cell.
during which phase does development of the structure that exchanges nutrients between the mother and the offspring begin? click on your answer in the concept map.
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The development of the structure that exchanges nutrients between the mother and the offspring begins during the embryonic phase of pregnancy. This phase starts from the moment of fertilization and lasts until the end of the eighth week of pregnancy.
During this phase, the embryo undergoes rapid cell division and differentiation to form the basic structures of the body, including the placenta. The placenta is an organ that develops within the uterus and connects the mother's blood supply with that of the developing fetus. It acts as a filter, allowing oxygen and nutrients to pass from the mother to the fetus while removing waste products from the fetal blood.
The placenta also produces hormones that help to maintain the pregnancy and prepare the mother's body for birth. Thus, the embryonic phase is a crucial time for the development of the placenta and the establishment of the nutrient exchange system between the mother and the offspring.
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A female elephant produces an egg that contains a cell with 28 chromosomes how many chromosomes are there in a body cell
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The number of chromosomes in a body cell is typically double the number found in an egg or sperm cell. Therefore, if the egg produced by a female elephant contains 28 chromosomes, the body cells of an elephant would generally contain 56 chromosomes.
In most organisms, including elephants, the body cells are diploid, meaning they contain two sets of chromosomes. During sexual reproduction, the egg and sperm cells, also known as gametes, contribute half the number of chromosomes found in body cells. This is known as haploid, meaning they contain a single set of chromosomes.
In the case of the female elephant, if the egg cell contains 28 chromosomes, it is a haploid cell. Therefore, the body cells, including those in tissues, organs, and muscles, would typically contain twice that number, which is 56 chromosomes. When the egg is fertilized by a sperm cell, which also contributes 28 chromosomes, the resulting zygote will have the complete diploid set of 56 chromosomes.
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of all the offspring resulting from all the matings in this population, what percentage should have the genotype crcr?
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The predicted number of people carrying the genotype CRCR is p2, or 64%. 2pq, or 32%, of people are anticipated to have the genotype CRCW.
The anticipated genotype frequencies are p2, 2pq, and q2 if a population has two alleles at a particular site and the allele frequencies are p and q. Once a population is in Hardy-Weinberg equilibrium, its frequency distribution won't vary from generation to generation.
A population's genotype frequency is calculated by dividing the number of people having a particular genotype by the overall population size. The visibility rate for the only dominant phenotype is 100%. There is no phenotypic ratio since there is no second phenotype.
The ratio that would be used to represent this outcome is 4:0. However, the genotypic ratio examines potential allele combinations rather than the observable trait (phenotype).
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I really need help with this. Thank you.
Answers
Answer:
looks like two compounds so mixture
a group of nonphotosynthetic organisms that usually have cell walls containing chitin is called?
Answers
The group of non photosynthetic organisms that usually have cell walls containing chitin is called fungi.
Fungi are a diverse group of organisms that include yeasts, molds, and mushrooms. They are found in almost every environment on earth, from soil to water to air. Fungi are important decomposers, breaking down dead organic matter and recycling nutrients back into the ecosystem.
They also form mutualistic relationships with other organisms, such as mycorrhizal fungi that provide plants with essential nutrients in exchange for sugars. The cell walls of fungi are made up of chitin, a strong and flexible polysaccharide that also forms the exoskeletons of insects and crustaceans.
Some fungi are also pathogenic, causing diseases in plants and animals, while others produce antibiotics and other useful compounds for humans.
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